import turtle
turtle.setup(400,400)
turtle.penup()
turtle.goto(0 - 7500 ** 0.5 / 2,-3)
turtle.pendown()
turtle.setheading(0)

for i in range(0,3):    
    for j in range(1,101):
        turtle.forward(1)
        turtle.color((j/100,j/100,j/100))
            
    turtle.left(120)